fix(core): improve homescreen upload speed over BLE

diff --git a/core/embed/rust/build.rs b/core/embed/rust/build.rs
index 204e52a00..6780045b9 100644
--- a/core/embed/rust/build.rs
+++ b/core/embed/rust/build.rs
@@ -430,6 +430,7 @@ fn generate_trezorhal_bindings() {
         .allowlist_function("ble_set_name")
         .allowlist_function("ble_unpair")
         .allowlist_function("ble_get_bond_list")
+        .allowlist_function("ble_set_high_speed")
         .allowlist_type("ble_command_t")
         .allowlist_type("ble_state_t")
         .allowlist_type("ble_event_t")
diff --git a/core/embed/rust/librust_qstr.h b/core/embed/rust/librust_qstr.h
index 540f67599..7731966dc 100644
--- a/core/embed/rust/librust_qstr.h
+++ b/core/embed/rust/librust_qstr.h
@@ -792,6 +792,7 @@ static void _librust_qstrs(void) {
   MP_QSTR_send__transaction_signed;
   MP_QSTR_send__you_are_contributing;
   MP_QSTR_set_brightness;
+  MP_QSTR_set_high_speed;
   MP_QSTR_set_name;
   MP_QSTR_setting__adjust;
   MP_QSTR_setting__apply;
diff --git a/core/embed/rust/src/trezorhal/ble/micropython.rs b/core/embed/rust/src/trezorhal/ble/micropython.rs
index 693a7f989..452beff35 100644
--- a/core/embed/rust/src/trezorhal/ble/micropython.rs
+++ b/core/embed/rust/src/trezorhal/ble/micropython.rs
@@ -87,6 +87,17 @@ extern "C" fn py_set_name(name: Obj) -> Obj {
     unsafe { util::try_or_raise(block) }
 }
 
+extern "C" fn py_set_high_speed(enable: Obj) -> Obj {
+    let block = || {
+        let enable: bool = enable.try_into()?;
+
+        set_high_speed(enable);
+
+        Ok(Obj::const_none())
+    };
+    unsafe { util::try_or_raise(block) }
+}
+
 extern "C" fn py_switch_off() -> Obj {
     let block = || {
         switch_off()?;
@@ -323,6 +334,12 @@ pub static mp_module_trezorble: Module = obj_module! {
     ///     """
     Qstr::MP_QSTR_set_name => obj_fn_1!(py_set_name).as_obj(),
 
+    /// def set_high_speed(enable: bool):
+    ///     """
+    ///     Set high speed connection.
+    ///     """
+    Qstr::MP_QSTR_set_high_speed => obj_fn_1!(py_set_high_speed).as_obj(),
+
     /// def switch_off():
     ///     """
     ///     Stop advertising and disconnect any connected devices.
diff --git a/core/embed/rust/src/trezorhal/ble/mod.rs b/core/embed/rust/src/trezorhal/ble/mod.rs
index 6fd39c476..5ad1f5f6b 100644
--- a/core/embed/rust/src/trezorhal/ble/mod.rs
+++ b/core/embed/rust/src/trezorhal/ble/mod.rs
@@ -170,6 +170,10 @@ pub fn set_name(name: &str) {
     unsafe { ffi::ble_set_name(bytes.as_ptr(), bytes.len()) }
 }
 
+pub fn set_high_speed(enable: bool) {
+    unsafe { ffi::ble_set_high_speed(enable) }
+}
+
 pub fn start_comm() {
     unsafe { ffi::ble_start() }
 }
diff --git a/core/embed/sys/syscall/inc/sys/syscall_numbers.h b/core/embed/sys/syscall/inc/sys/syscall_numbers.h
index 49c9003d6..7a483d190 100644
--- a/core/embed/sys/syscall/inc/sys/syscall_numbers.h
+++ b/core/embed/sys/syscall/inc/sys/syscall_numbers.h
@@ -129,6 +129,7 @@ typedef enum {
   SYSCALL_BLE_SET_NAME,
   SYSCALL_BLE_UNPAIR,
   SYSCALL_BLE_GET_BOND_LIST,
+  SYSCALL_BLE_SET_HIGH_SPEED,
 
   SYSCALL_NRF_UPDATE_REQUIRED,
   SYSCALL_NRF_UPDATE,
diff --git a/core/embed/sys/syscall/stm32/syscall_dispatch.c b/core/embed/sys/syscall/stm32/syscall_dispatch.c
index 785544807..34949c005 100644
--- a/core/embed/sys/syscall/stm32/syscall_dispatch.c
+++ b/core/embed/sys/syscall/stm32/syscall_dispatch.c
@@ -639,6 +639,11 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
       size_t list_size = args[1];
       args[0] = ble_get_bond_list__verified(list, list_size);
     } break;
+
+    case SYSCALL_BLE_SET_HIGH_SPEED: {
+      bool enable = args[0];
+      ble_set_high_speed(enable);
+    } break;
 #endif
 
 #ifdef USE_NRF
diff --git a/core/embed/sys/syscall/stm32/syscall_stubs.c b/core/embed/sys/syscall/stm32/syscall_stubs.c
index f8c4ff53d..1a463ca0f 100644
--- a/core/embed/sys/syscall/stm32/syscall_stubs.c
+++ b/core/embed/sys/syscall/stm32/syscall_stubs.c
@@ -621,6 +621,10 @@ uint8_t ble_get_bond_list(bt_le_addr_t *bonds, size_t count) {
                                   SYSCALL_BLE_GET_BOND_LIST);
 }
 
+void ble_set_high_speed(bool enable) {
+  syscall_invoke1((uint32_t)enable, SYSCALL_BLE_SET_HIGH_SPEED);
+}
+
 #endif
 
 #ifdef USE_NRF
diff --git a/core/mocks/generated/trezorble.pyi b/core/mocks/generated/trezorble.pyi
index 6cb86d4f0..a68608e8e 100644
--- a/core/mocks/generated/trezorble.pyi
+++ b/core/mocks/generated/trezorble.pyi
@@ -68,6 +68,13 @@ def set_name(name: str | None):
     """
 
 
+# rust/src/trezorhal/ble/micropython.rs
+def set_high_speed(enable: bool):
+    """
+    Set high speed connection.
+    """
+
+
 # rust/src/trezorhal/ble/micropython.rs
 def switch_off():
     """
diff --git a/core/src/apps/management/apply_settings.py b/core/src/apps/management/apply_settings.py
index 17712f194..b90ba49ac 100644
--- a/core/src/apps/management/apply_settings.py
+++ b/core/src/apps/management/apply_settings.py
@@ -92,8 +92,16 @@ async def apply_settings(msg: ApplySettings) -> Success:
     if homescreen_length is not None:
         if homescreen is not None:
             raise ProcessError("Mutually exclusive settings")
+        if utils.USE_BLE:
+            from trezorble import set_high_speed
 
-        homescreen = await _load_homescreen(homescreen_length)
+            set_high_speed(True)
+
+        try:
+            homescreen = await _load_homescreen(homescreen_length)
+        finally:
+            if utils.USE_BLE:
+                set_high_speed(False)
 
     if homescreen is not None:
         _validate_homescreen(homescreen)